Parallel Rack Systems - Hussmann

Parallel Rack Systems

IMPORTANT

Keep in store for future reference!

MANUAL- I/O PARALLEL RACK

Installation & Operation Manual

P/N 0427598_E

August 2018

P/N 0427598_E

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INSTALLATION

TABLE OF CONTENTS

Shipping Damage. . . . . . . . . . . . . . . . . . . . 1-1 General Rack Description. . . . . . . . . . . . . 1-1 General Rack Components. . . . . . . . . . . . 1-1 Remote Satellite Components . . . . . . . . . 1-2 Legend, Labels & Wiring Diagrams . . . . . 1-2 Setup Sheet. . . . . . . . . . . . . . . . . . . . . . . . . 1-2 Machine Room Requirements. . . . . . . . . . 1-3 Handling. . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4 Rack Unit Placement. . . . . . . . . . . . . . . . . 1-5

Minimum Allowable Distances . . . . . . . . . . . . . . . 1-5 Maximum Allowable Distances. . . . . . . . . . . . . . . 1-5

Ventilation . . . . . . . . . . . . . . . . . . . . . . . . . 1-6 Floor Drain . . . . . . . . . . . . . . . . . . . . . . . . 1-6 Remote Condenser Placement. . . . . . . . . . 1-6 Installing Vibration Pads. . . . . . . . . . . . . . 1-7 Rack Sizing Charts. . . . . . . . . . . . . . . . . . . 1-8

COMPONENT PIPING & LINE SIZING

Rack Piping Overview. . . . . . . . . . . . . . . . 2-1 Refrigeration Line Runs . . . . . . . . . . . . . . 2-1 Insulation. . . . . . . . . . . . . . . . . . . . . . . . . . 2-3 Special Piping for Open Rooms. . . . . . . . . 2-3 Connecting Parallel 3-Way Valves . . . . . . 2-3 Run Lengths and Equivalent Feet. . . . . . . 2-3 Rack to Condenser Piping. . . . . . . . . . . . . 2-4 Purge Valve Location. . . . . . . . . . . . . . . . . 2-4 Receiver Safety Relief Valve . . . . . . . . . . . 2-4 Connecting to Two Manifolds. . . . . . . . . . 2-5

Equalizing Line. . . . . . . . . . . . . . . . . . . . . . 2-5 Condenser Piping w/ Heat Reclaim. . . . . . 2-6 Split Condenser Piping . . . . . . . . . . . . . . . 2-7 Split Condenser Piping (3-Way Valve) . . . 2-8 Rack to Heat Reclaim. . . . . . . . . . . . . . . . 2-9 Rack to Remote Header . . . . . . . . . . . . . . 2-9 Rack to Remote Satellite. . . . . . . . . . . . . . 2-9

Discharge Lines for Two Satellites. . . . . . . . . . . . . 2-9 Oil Lines for Remote Satellites . . . . . . . . . . . . . . . 2-9

Offset and Expansion Loop Const.. . . . . 2-10 Branch Line Piping. . . . . . . . . . . . . . . . . . 2-11 Koolgas Defrost. . . . . . . . . . . . . . . . . . . . 2-12

REFRIGERATION

Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1 Basic Refrigeration Cycle. . . . . . . . . . . . . . 3-1 Rack Diagram . . . . . . . . . . . . . . . . . . . . . . 3-2 Thermostatic Expansion Valve . . . . . . . . . 3-3

Superheat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3

Heat Reclaim Cycle. . . . . . . . . . . . . . . . . . 3-3 Heat Reclaim Valve. . . . . . . . . . . . . . . . . . 3-4 Flooding Valve and Receiver Pressure

Regulating Valve. . . . . . . . . . . . . . . . . . . 3-4 Koolgas Defrost Cycle. . . . . . . . . . . . . . . . 3-5 Oil System. . . . . . . . . . . . . . . . . . . . . . . . . . 3-5 Y825 Valve Adjustment. . . . . . . . . . . . . . . 3-6 Ambient Subcooling. . . . . . . . . . . . . . . . . . 3-7

Continued on Page iv

IMPORTANT KEEP IN STORE FOR FUTURE REFERENCE

Quality that sets industry standards!

12999 St. Charles Rock Road ? Bridgeton, MO 63044-2483 U.S. &Canada 1-800-922-1919 ? Mexico 01-800-890-2900



? 2018 Hussmann Corporation

HUSSMANN CORPORATION ? BRIDGETON, MO 63044-2483 U.S.A.

Parallel Rack

iv

Mechanical Subcooling . . . . . . . . . . . . . . . 3-7 Two Stage Mechanical Subcooling. . . . . . 3-7 Liquid Injection . . . . . . . . . . . . . . . . . . . . . 3-8 EPR Valve . . . . . . . . . . . . . . . . . . . . . . . . . 3-9 CPR Valve . . . . . . . . . . . . . . . . . . . . . . . . 3-10 Main Liquid Line Solenoid Valves . . . . . 3-11 Branch Liquid Line Solenoid Valves . . . 3-11 3-Way Split Condensing Valves. . . . . . . . 3-12 Surge Receiver Valves . . . . . . . . . . . . . . . 3-12 Subcooling with Plate Heat Exchanger . 3-12 Liquid Line Differential Valve Adjustment. . . . . . . . . . . . . . . . . . . . . . . . 3-13 SORIT Evap Pressure Reg Adjustment. . . 3-13 Low Pressure Controls. . . . . . . . . . . . . . . 3-13 Control Settings General Description. . . 3-15

ELECTRICAL

Electrical Overview. . . . . . . . . . . . . . . . . . . 4-1 Field Wiring. . . . . . . . . . . . . . . . . . . . . . . . 4-1

For Remote Header Defrost Assembly. . . . . . . . . 4-1 For 208-230/3/60 Compressor Units . . . . . . . . . . . 4-1

Required Field Wire Size. . . . . . . . . . . . . . 4-1 Merchandiser Electrical Data . . . . . . . . . . 4-2 Merchandiser Field Wiring . . . . . . . . . . . . 4-2 Electrical Connections. . . . . . . . . . . . . . . . 4-2 Identification of Wiring. . . . . . . . . . . . . . . 4-2 Electrical Diagrams . . . . . . . . . . . . . . . . . . 4-3

Unit Cooler Fan Wiring. . . . . . . . . . . . . . . . . . . . . 4-3 Cooler Door Switch Wiring. . . . . . . . . . . . . . . . . . 4-3

Component Wiring Guidelines . . . . . . . . . 4-3

Sizing Wire and Overcurrent Protectors. . . . . . . . 4-3 Other Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3

Compressor Control. . . . . . . . . . . . . . . . . . 4-3 Electronic Controller. . . . . . . . . . . . . . . . . 4-4 Time Delay. . . . . . . . . . . . . . . . . . . . . . . . . 4-4 Pressure Switches. . . . . . . . . . . . . . . . . . . . 4-4 Switchback Control (Optional). . . . . . . . . 4-4 Crankcase Heaters (Optional). . . . . . . . . . 4-4 Oil Failure Relay . . . . . . . . . . . . . . . . . . . . 4-4 Current Relay (Optional). . . . . . . . . . . . . . 4-4 Defrost Controls. . . . . . . . . . . . . . . . . . . . . 4-5

Refrigeration Mode . . . . . . . . . . . . . . . . . . . . . . . . 4-5 Defrost Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5

Temperature Controls . . . . . . . . . . . . . . . . 4-5

Refrigeration Thermostat (Alternate) . . . . . . . . . . 4-5 Case Probe (Alternate). . . . . . . . . . . . . . . . . . . . . . 4-5 Defrost Termination Thermostat. . . . . . . . . . . . . . 4-5 Master Defrost Valve. . . . . . . . . . . . . . . . . . . . . . . 4-5

Alarm Control . . . . . . . . . . . . . . . . . . . . . . 4-6

Alarm System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-6 Alarm Control (Electronic). . . . . . . . . . . . . . . . . . . 4-6 Alarm Systems. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-6

Inverter Control. . . . . . . . . . . . . . . . . . . . . 4-6

Unit Cooler Fan Wiring. . . . . . . . . . . . . . . . . . . . . 4-7 Evaporator Mounted Liquid Line Solenoid . . . . . 4-7 Cooler Door Switch Wiring. . . . . . . . . . . . . . . . . . 4-7 Sizing Wire and Overcurrent Protectors . . . . . . . . 4-7

START-UP

Leak Testing. . . . . . . . . . . . . . . . . . . . . . . . 5-1 Pre-Charge Check List. . . . . . . . . . . . . . . . 5-1 Charging. . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2

Oil Levels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2 Evacuation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3 Final Checks. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3 Thermostat Settings . . . . . . . . . . . . . . . . . . . . . . . . 5-3

Liquid Drier Core Replacement . . . . . . . . 5-3 Suction Filter Core Replacement . . . . . . . 5-3

MAINTENANCE

Compressor Replacement . . . . . . . . . . . . . 6-1 Winter Condensing Pressure Controls . . . 6-2 General Maintenance. . . . . . . . . . . . . . . . . 6-3 Drier and Filter Cores Replacement. . . . . 6-4

SERVICE

Trouble Shooting Information . . . . . . . . . 7-1 Trouble Shooting Guides . . . . . . . . . . . . . 7-2 Supermarket Equipment . . . . . . . . . . . . . . 7-4

P/N 0427598_E

U.S. &Canada 1-800-922-1919 ? Mexico 1-800-890-2900 ? WWW.

P/N 0427598_E

v

REVISION HISTORY

Revision E - Updated with California Warning

Revision D - moved Nomenclature, vi, Added, Page 1-4 Lifting Details, Updated Page 1-6, Revised Drawings in Section 2; Removed Line Sizing Charts

Revision C - Added Trouble Shooting Guide Revision B - Revised Vibration Pad Table, Page 1-6

ORIGINALISSUE -- February 2013

* * * * * * * * * * * * * * * * * * * * * * * * * *

ANSIZ535.5 DEFINITIONS

? DANGER ? Indicate[s] a hazardous situation which, if not avoided, will result in death or serious injury.

? WARNING ? Indicate[s] a hazardous situation which, if not avoided, could result in death or serious injury.

? CAUTION ? Indicate[s] a hazardous situation which, if not avoided, could result in minor or moderate injury.

? NOTICE ? Not related to personal injury ? Indicates[s] situations, which if not avoided, could result in damage to equipment.

August 31, 2018

This warning does not mean that Hussmann products will cause cancer or reproductive harm, or is in violation of any product-safety standards or requirements. As clarified by the California State government, Proposition 65 can be considered more of a `right to know' law than a pure product safety law. When used as designed, Hussmann believes that our products are not harmful. We provide the Proposition 65 warning to stay in compliance with California State law. It is your responsibility to provide accurate Proposition 65 warning labels to your customers when necessary. For more information on Proposition 65, please visit the California State government website.

HUSSMANN CORPORATION ? BRIDGETON, MO 63044-2483 U.S.A.

Parallel Rack

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